JPS59107814A - Drilling method of printed circuit board - Google Patents

Abstract

PURPOSE:To perform drilling of an undrilled part effectively based on stored data, by storing coordinate positions at the time of generation of a broken drill and up to the time of replacement of the drill after that, at the time of drilling of the titled board by making use of a numerically controlled drilling machine with a detecting mechanism of the broken drill. CONSTITUTION:When a broken drill is generated at a position (b) while drilling is being done in turn in the direction of arrow from a position (a) in a printed circuit board 10, an NC controller 4 is informed of generation of the broken drill immediately through a boken drill detecting mechanism provided on a drilling machine. Action of the drilling machine is kept on, and an output of the broken drill detecting mechanism is applied to the NC controller, for example, until the drill is replaced at a position (c). Absolute coordinate values from respective times are obtained through stored data from the time of generation of the broken drill until the time of replacement of the drill, through which processing data of a part which has become unprocessed due to the broken drill are prepared. An unprocessed part is made to reprocess based on the processing data after that.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a method for drilling holes in a printed wiring board.

(2) Background of the Technology Conventionally, printed wiring boards have been used in electronic devices such as computer calculators and communication devices to streamline the mounting of components and the wiring between those components.

This printed wiring board is provided with through holes for connecting conductors in each layer and for mounting components. 2. Description of the Related Art Recently, as electronic devices have become smaller and have larger capacities, component mounting density and wiring density have become higher.

For this reason, a single printed wiring board has thousands of enemy through holes.

(3) Prior Art and Problems Conventionally, a high-speed numerically controlled goal board as shown in FIG. 1 has been used to prepare the through hole. This is printed wiring board 1
It has a table 2 that is fixed and driven in the X direction, and a drill head 3 that is driven in the Y direction and two directions. This is done by driving the

And this? - Since the cutting ability of the drill used for the drilling machine decreases after hundreds of holes are drilled, the number of holes drilled is counted and when a predetermined number is reached, the drill drill is replaced manually or automatically. .

However, if the drill breaks before reaching the specified number,
This results in parts that are not drilled until the drill is replaced or discovered by the operator.

After all the holes have been drilled, the parts that were not drilled are re-drilled after manually returning the printed wiring board to the point where the drill breakage occurred. However, conventional drilling methods have disadvantages in that when the drill breaks, a great deal of time is lost, and drilling errors occur when re-drilling.

(4) Purpose of the Invention In view of the above-mentioned conventional drawbacks, the object of the present invention is to provide a method for drilling holes in printed wiring boards that minimizes the loss of working time due to drill breakage and prevents mistakes during re-drilling. That is.

15) Description of the Invention According to the present invention, in a method for drilling holes in a printed wiring board using a ZOL machine with a drill breakage detection mechanism, the coordinate position at the time when a drill breakage occurs and the point at which the drill is replaced thereafter is determined. The coordinate position of is stored in the NC control device,
A hole in a printed wiring board characterized in that processing data for a portion that could not be drilled due to a drill breakage is created based on the memory, and re-drilling is performed for the portion that could not be drilled based on the data. This is achieved by providing a drilling method.

(6) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a diagram for explaining the printed wiring board drilling method according to the present invention, in which a is a printed wiring board and b is a flowchart. In the figure, 10 indicates a printed wiring board, and 11 indicates a through hole.

To explain the method of the present invention with reference to the drawings, it is assumed that in the printed wiring board 10 shown in Fig. a, holes are sequentially drilled in the direction of the arrow from the point (■), and drill breakage occurs at 90 points. Then, the drill breakage detection mechanism provided on the goal board immediately reports this to the NC control device. However, the goal board continues to work, and progresses without actually drilling until the operator discovers a broken drill or replaces the drill after reaching a predetermined number of times. The NC control device is notified by the drill breakage detection mechanism until the time θ when the drill is replaced.

The NC control device memorizes the information from the time of drill breakage that was previously notified to the time of drill replacement, and calculates the absolute coordinate values from the origin at each point in time, and calculates the absolute coordinate values from the origin at each point in time. Create machining data for the part. After replacing the drill for the beer disc, continue drilling until the final point ■.

When the restart button is pressed here, the drilling machine performs the drilling process on the previously unprocessed part based on the machining data for the unprocessed part created by the NC control device, and completes the drilling of all the holes.

In this way, the coordinate positions of holes that were not machined due to drill breakage are memorized by the NC control device, machining data is created, and re-machining is automatically performed using this machining data, reducing work time. and work errors are prevented.

(7) Effects of the Invention As explained in detail above, the printed wiring board drilling method of the present invention makes it possible to automatically rework unfinished holes caused by broken drills with 116 simple operations. This has great effects in that work time can be shortened and work errors can be prevented.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining a high-speed numerically controlled drilling machine, and FIG. 2 is a diagram for explaining a printed wiring board drilling method according to the present invention. In the drawings, 10 indicates a printed wiring board, and 11 indicates a through hole. 1 person for patents Fujitsu Ltd. Patent application representative Patent attorney Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney 1) Yukio Patent attorney Akira Yamaguchi Figure 1 Figure 2 (a) (b)

Claims (1)

[Claims] II'') In a method for drilling printed wiring boards using a numerically controlled Seel machine with a breakage detection mechanism, the coordinate position at the time the drill breakage occurs and the coordinate position until the time the drill is replaced thereafter are stored in the NC control device. , a printed wiring board characterized in that based on the memory, machining data for a part that could not be drilled due to a drill breakage is created, and the part that could not be drilled is re-drilled based on the data. Drilling method.